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Configuration and Use Manual 59
Optional Configuration
Required Configuration Optional ConfigurationUsing the TransmitterUsing a DeviceNet Tool Required Configuration Optional ConfigurationUsing the TransmitterUsing a DeviceNet Tool Required Configuration Optional ConfigurationUsing the TransmitterUsing a DeviceNet Tool Required Configuration Optional ConfigurationUsing the TransmitterUsing a DeviceNet Tool
To configure cutoffs:
• Using ProLink II, see Figure B-2.
• Using a DeviceNet tool, see Tables C-1, C-2, C-3, and C-5.
Note: This functionality is not available via the display menus.
8.3.1 Cutoffs and volume flow
If you are using liquid volume flow measurement:
• The density cutoff is applied to the volume flow calculation. Accordingly, if the density drops
below its configured cutoff value, the volume flow rate will go to zero.
• The mass flow cutoff is not applied to the volume flow calculation. Even if the mass flow
drops below the cutoff, and therefore the mass flow indicators go to zero, the volume flow rate
will be calculated from the actual mass flow process variable.
If you are using gas standard volume flow measurement, neither the mass flow cutoff nor the density
cutoff is applied to the volume flow calculation.
8.4 Configuring the damping values
A damping value is a period of time, in seconds, over which the process variable value will change to
reflect 63% of the change in the actual process. Damping helps the transmitter smooth out small,
rapid measurement fluctuations.
• A high damping value makes the output appear to be smoother because the output must change
slowly.
• A low damping value makes the output appear to be more erratic because the output changes
more quickly.
Damping can be configured for flow, density, and temperature.
When you change the damping value, the specified value is automatically rounded down to the nearest
valid damping value. Valid damping values are listed in Table 8-3.
Note: For gas applications, Micro Motion recommends a minimum flow damping value of 2.56.
Before setting the damping values, review Section 8.4.1 for information on how the damping values
affect other transmitter measurements.
Table 8-2 Cutoff default values
Cutoff type Default Comments
Mass flow 0.0 g/s Recommended setting: 5% of the sensor’s rated maximum flowrate
Liquid volume flow 0.0 L/s Limit: the sensor’s flow calibration factor in liters per second, multiplied by 0.2
Gas standard volume
flow
0.0 No limit
Density 0.2 g/cm
3
Range: 0.0–0.5 g/cm
3